Where: The Clocktower / wherever people are watching the video
When: Sunday, June 24, 2012, the wee hours of the morning PRE-PLAY
What: A riddle sent to Oracle shows off Eddie and Harley's musical skills
Rating: PG (although reactions may change this)
ETA: NOW WITH SPOILERS TO REVEAL THE ANSWER!
( Now I'm looking at a flash-back Sunday... )